^TriOl!' ] PROCEEDINGS OF THE NATIONAL MUSEUM. 555 



spinous dorsal. Belly wholly scaled; nape scaled forwards nearly to 

 orbits, but witb a narrow median naked streak ruuuiug back to front 

 of dorsal. Breast and sides of bead naked. 



Dorsal fins not connected. First four spines filamentous, the longest 

 longer tban bead, reacbin^ wben depressed to base of tbird ray of soft 

 dorsal. Soft dorsal and anal similar, not bigli, tlie last rays not ex- 

 tending beyond the base of caudal. Caudal hmceolate, njuch longer 

 than bead. Pectorals and ventrals about equal, reaching vent. 



Head 4^ in length ; depth 5. D. Vl-13; A. 14. Lat. 1., G2. 



Color nearly uniform light olive, witb minute darker ))unctulations 

 which sometimes form darker margins to the scales. An oblique dusky 

 streak ou opercle. Three or four oblique obscure dark cross-bars on 

 spinous dorsal, and lour or five on tail. Ventrals with white i)igment. 



Two specimens, each about 2 inches long, from the San Juan Lagoon, 

 immediately north of the Kio Ahome, Mexico. 



KEY TO SPECIES OF BOLLMANNIA. 



fl. A conspicuous black spot on posterior portion of spinous dorsal. Body deep, the 

 least dejitli of caudal peduncle greater than diameter of orbit. 

 b. Filamentous dorsal spines very louj^, reaching beyond middle of soft dorsal when 

 depressed. Lower caudal rays black. Dorsal spot conspicuously oceiiated. 



Eye large, 3 to [i^ iu head Ocellata. 



hb. Filamentous dorsal spines shorter. Lower caudal rays not black, and dorsal 



spot not oceiiated. Eye smaller, I5.J to 4 in head Ciilamydes. 



aa. No black spot on 8piiu)U3 dorsal. Body slender, the depth one-fifth the leugth. 

 Least depth of caudal peduncle not greater than diameter of orbit, 

 c. Head large, 3 to ;J^ in length. No black spot at base of caudal. Fins low, 



MACROrOMA. 



CO. Head smaller, 3i iu length. A black spot at base of caudal. Fins higher, 



Stigmatura. 



20. Bollmaniiia ocellata sp. nov. 



*^ 

 Very close to BoUmannia chlamyde/i, the numerous specimens differing 



from the latter constantly' in the foUowiug respects: 



The eye is larger, 3 to 3i in bead (3.=| to 4 in ciilamydes). The fila- 

 mentous rays of spinous dorsal are much longer, reaching in adults,, 

 when laid back, to or nearly to end of base of soft dorsal, Ih to Ig times 

 length of head. Barely the filamentous dorsal rays are little more 

 elongate tban in chlamydes. Black spot on i)osterior part of spinous 

 dorsal jet black, conspicuously' oceiiated with white. A black streak 

 along lower margin of caudal, including several of the lower rays, 

 and running from base to tip of fin. No dusky bars visible on sides 

 in any of the types. Fins dusky; membranes uniting outer rays of 

 ventrals white, instead of black, as in chlamydes. No black spot at 

 l)ase of caudal. Branch iostegal membrane with a medial black streak. 

 Anal blackish. j. 



lJead,3.Uo33 in leugth; depth, 4i. D.vii— Uorlo; A.14. Lat. 1. 27. 



Teeth iu a narrow band in both jaws, tiie outer series in uiiper jaw 

 and both outer and inner series in lower jaw enlarged but not canine- 



